ZigBee를 이용한 뇌졸중 환자용 뇌자극기 개발과 PC기반 자극 제어용 사용자 인터페이스 개발

김국화(G. H. Kim),양윤석(Y. S Yang),이상민(S. M Lee),김남균(N. G Kim) 대한전기학회 2006 정보 및 제어 심포지엄 논문집 Vol.2006 No.1

We studied the prototypal developments of Plastic Cortex Stimulator (PCS) for stroke patients. The PC sends the stimulation parameters (amplitude, pulse width, cycle, etc.) to the transmitter ZigBee module through serial port. The receiver ZigBee module generates stimulation waveform. The generated output can be controlled by the PC program. Further study can be expanded to portable handset such as PDA using ZigBee. The wireless control of PCS with the handset can help the tele-rehabilitation.

상열감을 호소하는 소양인의 도적강기탕 치험 3례

김국화,박지은,최효재,이슬,채한,김지환,이정윤,Kukhwa Kim,Jieun Park,Hyojae Choi,Seul Lee,Han Chae,Jihwan Kim,Jeongyun Lee 사상체질의학회 2024 사상체질의학회지 Vol.36 No.1

Introduction This case series report an attempt to treat Sasang constitutional medicine on Soyangin patients with unspecified hot flush. Methods The patients in this case were diagnosed as Soyangin cold pattern and treated with herb medicine Dojeokgangi-tang. Treatment outcome was monitored retrospectively. Results Persistent hot flush significantly improved to normal levels in all 3 Soyangin patients, and 2 out of 3 showed the effect within 4 weeks, those with more chronic symptoms required more time. Discussion This study suggests the significance of Sasang constitutional medicine treatment in Soyangin patients with Hot flush. Additionally, the characteristics of patients with hot flush presented in this study were verified as meaningful diagnostics indicator of Soyangin lesser yang wind damage. Furthermore, it emphasizes the value of original symptoms as a standard for evaluating treatment effectiveness.

항공사 비정상 운항 복구를 위한 리-타이밍 전략과 개미군집최적화 알고리즘 적용

김국화(Guk hwa Kim),채준재(Jun jae Chae) 한국산업경영시스템학회 2017 한국산업경영시스템학회지 Vol.40 No.2

Airline schedules are highly dependent on various factors of uncertainties such as unfavorable weather conditions, mechanical problems, natural disaster, airport congestion, and strikes. If the schedules are not properly managed to cope with such disturbances, the operational cost and performance are severely affected by the delays, cancelations, and so forth. This is described as a disruption. When the disruption occurs, the airline requires the feasible recovery plan returning to the normal operations in a timely manner so as to minimize the cost and impact of disruptions. In this research, an Ant Colony Optimization (ACO) algorithm with re-timing strategy is developed to solve the recovery problem for both aircraft and passenger. The problem consists of creating new aircraft routes and passenger itineraries to produce a feasible schedule during a recovery period. The suggested algorithm is based on an existing ACO algorithm that aims to reflect all the downstream effects by considering the passenger recovery cost as a part of the objective function value. This algorithm is complemented by re-timing strategy to effectively manage the disrupted passengers by allowing delays even on some of undisrupted flights. The delays no more than 15 minutes are accepted, which does not influence on the on-time performance of the airlines. The suggested method is tested on the real data sets from 2009 ROADEF Challenge, and the computational results are compared with the existing ones on the same data sets. The method generates the solution for most of problem set in 10 minutes, and the result generated by re-timing strategy is discussed for its impact.

요가지도자의 변혁적 리더십이 수련자들의 감정반응 및 수련만족도에 미치는 영향

김국화 ( Kim Guk-hwa ) 한국리듬운동학회 2021 한국리듬운동학회지 Vol.14 No.1

The purpose of study is aimed to give useful information in a yoga instructor exercising efficient leadership and to give basic data in improving the relational communication between a yoga instructor and a student. In order to achieve this objective, we used convenience sampling among women Yoga trainees whom attend the Yoga class at least once a week residing at Youngdong Gang-won-do area. Among those people, we eliminated incongruent data, and ended up with 291 people. For the data processing of this study, SPSS 21.0 was used for proceeding statistically, and for analyzing the data, this study conducted the reliance analysis, the correlation analysis, the multiple regression analysis. The results drawn from such analyses were as follows. First, it is shown that a yoga leader’s transformational leadership significantly influenced on participants emotional response. It was shown that a student’s positive emotional response resulting from the leader’s transformational leadership significantly influenced on the intellectual stimulation and the ideal influence power, but negative emotional response did not affect any significant influence at all. second, was shown that a yoga leader’s transformational leadership significantly influenced on participants class satisfaction. A student’s professor behavior satisfaction and self-accomplishment sense affected significant influence on the all variables of intellectual stimulation, individual consideration, and ideal influence power.

성인여성의 요가수련유형과 생활만족도의 관계

김국화 ( Gook Hwa Kim ),민현주 ( Hyun Joo Min ) 대한무용학회 2012 대한무용학회논문집 Vol.70 No.2

본 연구는 우리나라에서 요가수련의 주류를 이루고 있는 전통요가와 요가수련의 새로운 흐름의 일부인 아쉬탕가 빈야사 요가, 비크람 요가와 생활만족도와의 차이와 관계를 연구함으로써 다양한 요가 프로그램의 대중화를 위한 방안을 제시하고 보다 체계적이고 다양한 요가 프로그램을 개발하기 위한 자료를 제공하는데 그 목적이 있다. 이를 위해 연구방법으로는 설문조사를 실시하였고 연구대상은 2009년 강원, 서울, 경기지역에 소재하고 있는 요가학원과 주민자치센터의 성인여성 요가수련자를 모집단으로 설정한 후, 유층집락무선표집법을 사용하여 총 600명을 표집 하였다. 표집된 600명 중 불성실하게 응답한 16명을 제외하고 최종분석에 584명의 자료를 이용하였다. 본 연구에서는 인구통계학적 특성은 4개 문항으로 조사 내용은 직업, 연령, 학력, 수입수준이고, 참여정도는 3개 문항으로 빈도, 기간, 시간이며, 생활만족도는 30개 문항으로 이종길(1992)이 번안한 설문지와, 이성철(1996), 김문식(1999), 권혜경(2004), 차유정(2007)의 연구에서 사용된 설문지 문항 중 본 연구의 목적에 맞게 수정ㆍ보완하여 신체적 만족, 교육적 만족, 사회적 만족, 심리적 만족, 경제적 만족의 5개 요인으로 분류하여 측정하였다. 조사절차에 따라 수집된 자료는 코딩의 지침에 따라 부호화된 후, 컴퓨터에 개별 입력시킨 후 통계프로그램인 SPSS 17.0 for Window version을 이용하여 분석목적에 따라 기술통계분석인 및 일원변량분석, 상관분석 및 다중회귀분석(standard multiple regression analysis)을 통해 검증하였다. 이상의 연구방법 및 연구결과를 기초로 하여 얻어진 결론은 다음과 같다. 첫째, 성인여성의 일반적 특성 (직업, 연령, 학력, 수입수준)과 생활만족도에 차이가 있는 것으로 나타났다. 둘째, 성인여성의 참여 정도 (빈도, 기간, 시간)와 생활만족도에 차이가 있는 것으로 나타났다. 셋째, 성인여성의 요가수련유형과 생활만족도에 차이가 있는 것으로 나타났다. 넷째, 여성의 요가수련유형과 생활만족도와는 관계가 있는 것으로 나타났다. 따라서 본 연구를 통해 살펴본 결과 아쉬탕가 요가와 비크람 요가에 대한 학문적 연구가 필요하며, 수도권 지역에서만 활발하게 이루어지고 있으므로 강원지역을 비롯해 다른 지방에서도 앞으로 활발하게 이루어져야 할 것이다. This study is designed to look into the differences between the life satisfaction of traditional yoga, which is predominant as a yoga practice in Korea, and that of a brandnew yoga practice including Ashtanga Vinyasa Flow Yoga and Bikram Yoga with a view to contributing to the establishment of appropriate yoga practice culture. It presents measures for the popularization of diverse yoga programs and offers materials for the development of systematic and various yoga programs. A questionnaire survey was conducted as the research method and the original participants totalled 600, who were sampled with the help of multi-stage stratified cluster random sampling after choosing female-adult yoga trainees at yoga centers and residents` self-governing centers as the population. 584 out of the 600 participants were finally selected and analyzed with the exclusion of 16 respondents whose answers were perceived unfaithful. The demographic features of this study include four items including jobs, age, academic backgrounds and income levels, and the survey posed three questions regarding frequency, period and time, asking the respondents thirty questions. The questionnaire was based on a questionnaire translated by Jong-gil Yi(1992), and a questionnaire utilized by Seong-cheol Yi(1996), Munsik Kim(1999), Hye-kyeong Kweon(2004), and Yu-jeong Cha(2007). The items were modified and complemented according to the purpose of this research, and divided into five factors including physical satisfaction, educational satisfaction, social satisfaction, psychological satisfaction and economic satisfaction for the sake of measurement. The materials collected from the survey were encoded according to the coding guideline, separately inputted into a computer and tested through one-way ANOVA, correlation analysis, and standard multiple regression analysis with the help of SPSS 17.0 for Window version according to the analysis purpose. The conclusions derived from the research method and findings are as follows. First, the survey shows that there is a difference in the participation degrees (such as frequency, period, and time) and the life satisfaction of the subjects. Second, the survey shows that there is a difference in the yoga practice types and the life satisfaction of the subjects. Third, the survey shows that there is a relationship between the yoga practice types and the life satisfaction of the subjects. It follows that, as Ashtanga Vinyasa Flow Yoga and Bikram Yoga flourish only in the capital city and its vicinity of Korea, this kind of yoga popularity should be spread to other regions including Kangneung Province. Further research should be made on the types of existing yoga in conjunction with the findings of this research and more systematic and diverse yoga programs should be developed.

‘101인 사건’ 피고인의 고문 피해 실태 연구

金菊花(Kuk-hwa KIM) 한국근현대사학회 2023 한국 근현대사 연구 Vol.107 No.-

이 글의 목적은 ‘101인 사건’ 피고인의 고문 피해를 분석하는 데에 있다. ‘101인 사건’은 1925년 11월에 발생한 조선공산당 제1차 검거 사건과 1926년6월에 발생한 조선공산당 제2차 검거 사건의 재판을 말한다. 공판은 1927년9월 13일에 개정되어 판결이 선고되는 1928년 2월 13일까지 약 5개월 동안진행되었다. 피고인은 경찰 조사와 예심을 거치면서 고문을 당했고, 열악한 형무소에서긴 시간 미결수로 수감되어 생활했다. 점점 몸과 정신은 피폐해졌다. 이 과정에서 피해자가 속출했다. 피고인 중에는 여러 가지 질병으로 더 이상 재판을 받을 수 없는 사람들이있었다. 피고인 중에는 질병으로 재판정에 일시적으로 출석하지 않는 피고인, 보석을 여러 차례 신청했지만 보석을 허가받지 못한 피고인, 보석으로 출옥한피고인 등이 있었다. 재판부는 피고인의 보석을 허가하지 않거나, 피고인이 빈사상태가 되어야만 보석을 허가했다. 박길양은 보석 출옥을 허가받았으나 출옥 직전에 사망했다. 백광흠은 보석으로 출옥한지 얼마 지나지 않아 고문 후유증으로 사망했다. 재판부 측에서는 피고인이 빈사상태에 이르러야만 보석을 허가했다. The purpose of this article is to analyze the torture victim suffered by the defendant in the ‘Korean Communist Party Incident’. The Korean Communist Party incident refers to the trial of the first arrest of the Korean Communist Party in November 1925 and the second arrest of the Korean Communist Party, which began during the preventive custody of June 10th National Movement in 1926. The defendant was tortured during the police investigation and preliminary hearing, and was imprisoned as an undertrial prisoner for a long time in a harsh prison. The defendant became increasingly exhausted physically and mentally. During this process, victims continued to emerge. Among the defendants, there were people who could no longer stand trial due to various illnesses. Seodaemun Prison tried to show through the diagnosis that it would be difficult for the defendant to appear in court or that bail was necessary. There were defendants who temporarily did not appear in court due to illness, defendants who applied for bail several times but were not granted bail, and defendants who were released from prison on bail. Park Gil-yang was granted release from prison on bail, but died just before he was released. Baek Gwang-heum died from aftereffects of torture shortly after being released from prison on bail. The court granted bail only when the defendant was in a critical condition.

ZigBee를 이용한 뇌졸중 치료용 무선 전기 자극기 개발

김국화,유문호,신용일,김형일,김남균,양윤석,Kim, G.H.,Ryu, M.H.,Shin, Y.I.,Kim, H.I.,Kim, N.G.,Yang, Y.S. 대한의용생체공학회 2007 의공학회지 Vol.28 No.1

Stroke is the second most significant disease leading to death in Korea. The conventional therapeutic approach is mainly based on physical training, however, it usually provides the limited degree of recovery of the normal brain function. The electric stimulation therapy is a novel and candidate approach with high potential for stroke recovery. The feasibility was validated by preliminary rat experiments in which the motor function was recovered up to 80% of the normal performance level. It is thought to improve the neural plasticity of the nerve tissues around the diseased area in the stroked brain. However, there are not so much research achievements in the electric stimulation for stroke recovery as for the Parkinson's disease or Epilepsy. This study aims at the developments of a wireless variable pulse generator using ZigBee communication for future implantation into human brain. ZigBee is widely used in wireless personal area network (WPAN) and home network applications due to its low power consumption and simplicity. The developed wireless pulse generator controlled by ZigBee can generate various electric stimulations without any distortion. The electric stimulation includes monophasic and biphasic pulse with the variation of shape parameters, which can affect the level of recovery. The developed system can be used for the telerehabilitation of stroke patient by remote control of brain stimulation via ZigBee and internet. Furthermore, the ZigBee connection used in this study provides the potential neural signal transmission method for the Brain-Machine Interface (BMI).

요가지도자의 비언어적 커뮤니케이션이 수련자들의 감정반응과 신체이미지에 미치는 영향

김국화 ( Guk-hwa Kim ),민현주 ( Hyun-joo Min ) 대한무용학회 2016 대한무용학회논문집 Vol.74 No.6

This research have aims at investigating the effect of yoga instructor`s nonverbal communication on trainees` em otion reaction, and sense of the self. We did reliability analysis, frequency analysis, member variable analysis, interrelation analysis, and multiple/periodic recurrence analysis. As a result, firstly, instructor`s physical, space, mind, and outward language had positive influence that led to right effect on participants. Space, mind, and outward language somewhat had negative influence on participants. Secondly, instructor`s outward language gave positive outcomes in both social and emotional self. Physical language had positive influence in finding physical self while mind, and outward language had negative influence.

‘101인 사건’ 판결과 「치안유지법」 적용

김국화(Kim, Kuk Hwa) 독립기념관 한국독립운동사연구소 2021 한국독립운동사연구 Vol.- No.74

이 글의 목적은 1920년대 민족해방운동을 대표하는 ‘101인 사건’의 판결을 통해 1925년에 제정된 「치안유지법」의 적용 양상을 밝히는 데에 있다. ‘101인 사건’은 1925년 11월에 발생한 조선공산당 제1차 검거 사건과 1926년 6·10만세운동의 예비검속 과정에서 시작된 조선공산 당 제1차 검거 사건의 재판을 말한다. 101인 사건 피고인은 「치안유지법」 위반 혐의로 기소되어 재판을 받았다. 피고인은 「치안유지법」 제1조 제1항인 “국체를 변혁하거나 사유재산제도를 부인하는 것을 목적으로 결사를 조직하거나 이에 가입”했다는 혐의가 씌워져 기소되었다. 101인 사건은 1925년에 제정된 「치안유지법」이 적용된 대규모 ‘사상사건’이었다. 모두 5명의 피고인에게 판결이 선고되었다. 피고인은 「치안유지법」의 제1조 제1항의 사유재산제도 부인 조항이 적용되어 징역 6년에서 징역 1년이 선고되었다. 일제는 「치안유지법」을 통해 피고인의 행위를 처벌하려고 했다. 비밀결사를 조직하거나 가입한 피고인의 행위는 「치안유지법」 제1조 제1항의 사유재산제도 부인 조항에 무게가 실려 처벌되었다. The purpose of this paper lies in the nature of the Korean Communist Party incident to analyze the behavior of the other three subjects. The Korean Communist Party incident refers to the trial of the first arrest of the Korean Communist Party in November 1925 and the second arrest of the Korean Communist Party, which began during the preventive custody of June 10th National Movement in 1926. The Korea Communist Party incident was a ‘Ideology Incident’. The purpose of this study is to examine the Japanese oppression of political offender who deny the Japanese system and the defendant’s response.

허리 관절을 갖는 4족 로봇의 경사면 보행을 위한 걸음새 생성 방법

김국화(Guk Hwa Kim),최윤호(Yoon Ho Choi),박진배(Jin Bae Park) 한국지능시스템학회 2012 한국지능시스템학회논문지 Vol.22 No.5

본 논문에서는 4족 로봇의 허리 관절을 이용하여 효율적인 경사면 보행을 위한 걸음새 생성 방법을 제안한다. 허리 관절을 갖는 4족 로봇의 기구학적 모델은 Denavit-Hartenberg 표현 방법과 대수적 방법을 이용하여 유도하고, 다리 이동 순서는 물결 걸음새(wave gait)를 사용한다. 한편 제안한 걸음새 생성 방법에서는 기구적 제한과 보폭의 감소를 완화하기 위해 경사면의 경사도에 따라 적절한 상체 및 하체의 허리 관절각을 결정하고, 에너지 안정도 여유(energy stability margin)를 증가시키기 위해 도달 영역(workspace)의 탐색을 통해 발끝 위치를 결정한다. 마지막으로, 컴퓨터 모의 실험을 통해 본 논문에서 제안한 알고리듬의 효용성 및 실제 적용 가능성을 검증한다. In this paper, we propose a gait generation method for a quadruped robot to walk efficiently on the slope, which uses the waist joint of a quadruped robot. We derive the kinematic model of a quadruped robot with waist joint using the Denavit-Hartenberg representation method and the algebraic method. In addition, the gaits are generated based on the wave gait. In the proposed gait generation method, first in order to alleviate the mechanical restriction and the reduction of the stride, we determine the appropriate waist joint angle according to the slope degree, and then decide the location of the tiptoe of a quadruped robot by exploring the workspace. Finally, through computer simulations, we verify the effectiveness and applicability of the proposed method.